Fan base



FIG. 1 is a top, front and right side perspective view of a fan base inaccordance with our invention;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a right side view thereof that is identical/symmetrical to theleft side view thereof;

FIG. 5 is a rear view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a top, rear and left side perspective view thereof.

The broken line showing of environmental structure in FIG. 1 is forillustrative purposes only and forms no part of the claimed design.

The ornamental design for a fan base, as shown and described.